The Mopar stats (mfg by Motorad) can be had from Rockauto, and are generally well regarded, if more expensive than generic parts store units.
I’ve installed Borg Wagner thermostats and those always failed until I installed a Mahle one which never failed. For some reason any other brand will get stuck open and the engine will never get up to temp.
I got a Mopar thermostat from the dealer a few months ago. Works much better than the previous two aftermarket units
In case anyone else comes across this post, it was the aftermarket thermostat. I managed to get a hold of a mopar one yesterday and the gasket around it was just slightly larger than the aftermarket one and needed a little bit of resistance to seat it. Now my truck is getting up to temperature quickly and working great.
I had a brand new mahle one with the connector wired in reverse for constant. Kept blowing a fuse. Returned it for a replacement and worked fine.
I just bought one off RockAuto. I have to overhaul my entire coolant system and through some searching on this subreddit I saw a lot of people saying the Motorad brand kept failing after a few months. I didn\u2019t want to risk it so I opted for the Mopar thermostat from RockAuto for $35.
Yep, these are a known bitch to bleed out the air, as well as aftermarket thermostat's not working well after replacement. I have seen some go thru a few to get one that works.
Stick with Mopar thermostat. I went off brand and it didn\u2019t work correctly.
Hatte auch schon ein Mahle Thermostat das kurz nach eimbau defekt war. Dannach ein Originales von BMW rein und seit dem wi3der keine Probleme.
The thermostat failed twice. Once at like 80k miles and again at 115k miles. The second time it failed I replaced it with an aftermarket one that had a metal stem instead of plastic. It made it until we traded it in.
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If choosing thermostat across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare thermostat across these categories:
In March 2026 on PartReview, thermostat MOPAR were overall better than Mahle.
Thermostat MOPAR and Mahle were equally popular according to data in March 2026.
By vote balance, thermostat MOPAR surpassed Mahle:
By number of reviews, thermostat Mahle surpassed MOPAR:
In March 2026, according to PartReview, these manufacturers led the same number of car-specific ratings:
MOPAR are chosen by owners of cars such as: Jeep Wrangler, and others.
Mahle are chosen by owners of cars such as: Jeep Grand Cherokee, and others.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of thermostat MOPAR with: MotoRad, Wahler, OEM Volkswagen, OEM Mazda, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Audi, AISIN.
Also available: comparisons of thermostat Mahle with: MotoRad, Wahler, OEM Volkswagen, OEM Mazda, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Audi, Duralast.
You can also see who is better among other thermostat manufacturers: Wahler or MotoRad, OEM Volkswagen or MotoRad, Mahle or MotoRad, OEM Mazda or MotoRad, MOPAR or MotoRad.
